I want to see what it would do if a cat jumped up on the table...

You are on the right track. Religion and morality are two different things. The two are logically separate from each other. (even if they weren't in theory, they certainly are in practice) A non religious person can be moral and religion doesn't prevent a person from being immoral. Morality only requires empathy and reciprocity. No coercion from invisible beings required.

A closer speed estimate: The Atari's chip took about 4 clock cycles per instruction. The Intel chip does 4 instructions per clock cycle. (so multiply by 16) The byte size is 8 bit vs 64 bits. (multiply again by 8) The Intel has a floating point subsystem. (multiply by 10? if you are doing math calculations. Probably more like 40 if you were to have each do 32bit floats.) The Intel has 2 cores. (multiply by 2) The Intel has L1 L2 RAM cache. (probably factored in to the 4 instructions per clock timing) So the actual speedup is more like 1000 x 16 x 8 x 10 x 2 = 2,560,000 for floating point and 1000 x 16 x 8 x 2 = 256,000 for data manipulation. Multiply by another 10 for the newer faster 8 core desktop machines.